Repeat sending of messages with attachments

When sending a large file
attachment (e.g. 2MB), the e-mail appears to hang in the outbox of the
mail client. Meanwhile MailEnable seems to be successfully sending it
multiple times.

Log files or clients are
reporting that a message is being sent/received multiple times.

DETAIL

MailEnable will only send
the email after it has successfully received
the full message. Firstly, check the SMTP Debug and Activity logs for any
errors.

If there are no errors and the problem is only
occurring on one machine, then check to make sure the timeout settings in
the mail client are set to a reasonable length of time to allow
the file to be sent.

If the problem is occurring on
more than one machine, make sure that the "Inbound mail max deliver time" option
in the MTA settings has not been changed to 0. This is accessed through the
MailEnable Administration Program. Expand the
Servers->Localhost->Connectors branch, right click on the MTA icon and
select Properties from the popup menu. Also, make sure there is
no resident anti-virus application running on the MailEnable
directories.